php_uname

Description

php_uname() returns a string with a description of the operating system PHP is built on. If you're just wanting the name of the operating system, consider using the PHP_OS constant.

Example 1. Some php_uname() examples <?php echo php_uname(); echo PHP_OS; /* Some possible outputs: Linux localhost 2.4.21-0.13mdk #1 Fri Mar 14 15:08:06 EST 2003 i686 Linux FreeBSD localhost 3.2-RELEASE #15: Mon Dec 17 08:46:02 GMT 2001 FreeBSD Windows NT XN1 5.1 build 2600 WINNT */ if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') { echo 'This is a server using Windows!'; } else { echo 'This is a server not using Windows!'; } ?>

There are also some related Predefined PHP constants that may come in handy, for example:

Example 2. A few OS related constant examples <?php // *nix echo DIRECTORY_SEPARATOR; // : echo PHP_SHLIB_SUFFIX; // so // Win* echo DIRECTORY_SEPARATOR; // ; echo PHP_SHLIB_SUFFIX; // dll ?>

See also phpversion(), php_sapi_name(), and phpinfo().